CVE-2026-9267

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Source

https://cve.org/CVERecord?id=CVE-2026-9267

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9267.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-9267

Published

2026-06-29T08:10:52Z

Modified

2026-10-08T07:15:43Z

Severity

6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

[none]

Details

Eclipse tinydtls before commit b3efd41ad111a4920f599f51ffa4f5e9f1e72221 contains an out-of-bounds read vulnerability in the check_server_certificate() function that allows unauthenticated attackers to trigger reads beyond valid buffer boundaries by crafting a Certificate handshake message with a specific fragment_length value. Attackers can exploit missing buffer length validation before uint24 reads, memcmp, and memcpy operations during DTLS epoch 0 on both client and server paths to cause denial of service on memory-constrained devices.

Database specific

{
    "cna_assigner": "eclipse",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9267.json"
}

References

Affected packages

Git / github.com/eclipse-tinydtls/tinydtls

Affected ranges

Type: GIT
Repo: https://github.com/eclipse-tinydtls/tinydtls
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

b3efd41ad111a4920f599f51ffa4f5e9f1e72221

Affected versions

Other

initial_contribution

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9267.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "56981484379777345487943578540244117054",
            "length": 1321
        },
        "id": "CVE-2026-9267-a6f55901",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/eclipse-tinydtls/tinydtls/commit/b3efd41ad111a4920f599f51ffa4f5e9f1e72221",
        "target": {
            "file": "dtls.c",
            "function": "check_server_certificate"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "164967579594099702706464224575554867039",
                "109962370517032031202138573779910048302",
                "242915927904298761692919658249395341018"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-9267-faac89c3",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/eclipse-tinydtls/tinydtls/commit/b3efd41ad111a4920f599f51ffa4f5e9f1e72221",
        "target": {
            "file": "dtls.c"
        }
    }
]

vanir_signatures_modified

"2026-10-08T07:15:43Z"